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Current sense amplifiers analog output

INA199-Q1

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AEC-Q100, 26V, bi-directional current sense amplifier

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Data sheet

INA199-Q1

ACTIVE
Data sheet Order now

Product details

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) -0.3 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 100, 200, 50 Gain error (%) 1.5, 1 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 100 Bandwidth (kHz) 80, 30, 14 Supply voltage (Max) (V) 26 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.115 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) -0.3 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 100, 200, 50 Gain error (%) 1.5, 1 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 100 Bandwidth (kHz) 80, 30, 14 Supply voltage (Max) (V) 26 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.115 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
SOT-SC70 (DCK) 6 4 mm² 2 x 2.1
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to 125°C, TA
  • Functional Safety-Capable
  • Wide common-mode range: –0.1 V to 26 V
  • Offset voltage: ±150 µV (maximum) (enables shunt drops of 10-mV full-scale)
  • Accuracy:
    • Gain error (maximum over temperature):
      • ±1% (C version)
      • ±1.5% (B version)
    • Offset drift: 0.5-µV/°C (maximum)
    • Gain drift: 10-ppm/°C (maximum)
  • Choice of gains:
    • INA199x1-Q1: 50 V/V
    • INA199x2-Q1: 100 V/V
    • INA199x3-Q1: 200 V/V
  • Quiescent current: 100 µA (maximum)
  • Package: 6-pin SC70
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to 125°C, TA
  • Functional Safety-Capable
  • Wide common-mode range: –0.1 V to 26 V
  • Offset voltage: ±150 µV (maximum) (enables shunt drops of 10-mV full-scale)
  • Accuracy:
    • Gain error (maximum over temperature):
      • ±1% (C version)
      • ±1.5% (B version)
    • Offset drift: 0.5-µV/°C (maximum)
    • Gain drift: 10-ppm/°C (maximum)
  • Choice of gains:
    • INA199x1-Q1: 50 V/V
    • INA199x2-Q1: 100 V/V
    • INA199x3-Q1: 200 V/V
  • Quiescent current: 100 µA (maximum)
  • Package: 6-pin SC70

The INA199-Q1 is a voltage-output, current-sense amplifier that can sense drops across shunts at common-mode voltages from –0.1 V to 26V, independent of the supply voltage. Three fixed gains are available: 50V/V, 100V/V, and 200V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10-mV full-scale.

This device operates from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current. All gain options are specified from –40°C to +125°C, and are offered in a 6-pin SC70 package.

The INA199-Q1 is a voltage-output, current-sense amplifier that can sense drops across shunts at common-mode voltages from –0.1 V to 26V, independent of the supply voltage. Three fixed gains are available: 50V/V, 100V/V, and 200V/V. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10-mV full-scale.

This device operates from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current. All gain options are specified from –40°C to +125°C, and are offered in a 6-pin SC70 package.
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Technical documentation

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Type Title Date
* Data sheet INA199-Q1 Automotive, 26-V, Bidirectional, Zero-Drift, Low-Side or High-Side, Voltage-Output, Current-Shunt Monitor datasheet (Rev. E) PDF | HTML 25 May 2021
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 17 Oct 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application note Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 29 Sep 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Functional safety information INA21x-Q1 and INA199-Q1 Functional Safety FIT Rate,FMD and Pin FMA (Rev. A) PDF | HTML 29 Apr 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML 02 Dec 2020
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017
Application note Low-Side Current Sense Circuit Integration 30 Mar 2017
EVM User's guide INA199B1-B3EVM User's Guide Hardware Version 2 08 Jul 2016
White paper Overcurrent protection enables more efficient and reliable systems 16 May 2016
EVM User's guide INA199A1-A3EVM User's Guide Hardware Version 1 13 May 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

INA199EVM — INA199 Evaluation Module

The INA199B1-B3 devices are voltage output, high-side measurement, bi-directional, zero-drift current

shunt monitors. The INA199EVM is intended to provide basic functional evaluation of this device family.  The fixture layout is not intended to be a model for the target circuit, nor is it laid (...)

User guide: PDF
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Simulation model

INA199A1 PSpice Model

SBOMBC8.ZIP (24 KB) - PSpice Model
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Simulation model

INA199A1 TINA Reference Design

SBOM926.TSC (252 KB) - TINA-TI Reference Design
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Simulation model

INA199A1 TINA Spice Macromodel

SBOM925.ZIP (7 KB) - TINA-TI Spice Model
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Simulation model

INA199A2 PSpice Model

SBOMBC1.ZIP (24 KB) - PSpice Model
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Simulation model

INA199A2 TINA Reference Design

SBOM928.TSC (253 KB) - TINA-TI Reference Design
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Simulation model

INA199A2 TINA Spice Macromodel

SBOM927.ZIP (7 KB) - TINA-TI Spice Model
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Simulation model

INA199A3 PSpice Model

SBOMBD0.ZIP (24 KB) - PSpice Model
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Simulation model

INA199A3 TINA Reference Design

SBOM930.TSC (253 KB) - TINA-TI Reference Design
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Simulation model

INA199A3 TINA Spice Macromodel

SBOM929.ZIP (7 KB) - TINA-TI Spice Model
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Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current sense amplifier comparison and error tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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Calculation tool

Current Sense Amplifier Comparison and Error Tool (Rev. E)

SBOR020E.ZIP (592 KB)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Reference designs

TIDA-00753 — Three Phase AC Current Measurements Using Current Transformer Reference Design

The TIDA-00753 reference design demonstrates high accuracy wide range AC current measurement for a three phase motor using the INA199 zero drift current shunt monitor. The design also has low power consumption of 25mW for Gain stage of 200 as compared to a discrete solution. The design footprint (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00748 — 60W Synchronous Boost LED Driver Reference Design for Automotive Application

TIDA-00748 is a 60W Synchronous Boost Design for automotive LED application utilizing the Synchronous Boost Converter LM5122-Q1.  This design applies to automotive lighting for exterior lighting such as headlights and taillights and also interior LED lighting systems. The design accepts an (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

Design guide: PDF
Schematic: PDF
Package Pins Download
SC70 (DCK) 6 View options

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  • Ongoing reliability monitoring

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